mfd: intel-lpss: Don't fail probe on success of pci_alloc_irq_vectors()

The pci_alloc_irq_vectors() returns a positive number on success.
Hence we have to filter the negative numbers for error condition.
Update the check accordingly.

Fixes: e6951fb ("mfd: intel-lpss: Use PCI APIs instead of dereferencing")
Reported-by: Heikki Krogerus <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Tested-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: andy-shev

drivers/mfd/intel-lpss-pci.c

@@ -44,7 +44,7 @@ static int intel_lpss_pci_probe(struct pci_dev *pdev,
 		return ret;
 
 	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY);
-	if (ret)
+	if (ret < 0)
 		return ret;
 
 	info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL);